DS80C400: PCEs and CEs?

From: Fred (Fred_at_nospam.com)
Date: 06/22/04 

Date: Tue, 22 Jun 2004 13:50:22 +0100

Perhaps the difference between these signals is too subtle for me but
essentially the above device has 8 chip enables CE[0..7] and 4 peripheral
chip enables PCE[0..3].

What's the difference between then? I see CEs have the higher priority if
there is an address conflict but that's about it. What am I missing here?